5×4=20 is closer to 24.9344.

Let's try placing the decimals after the hundreds place.

It works.
There is more than one possibility.


Answer:
17.3825
Step-by-step explanation:
First I figured out the area of the square which is 18×18=324
Then I found out the are of the circle which is 254.47, so 324 - 254.47 = 69.53
Then there are 4 times the shaded are so divided by 4, so 69.53 ÷ 4 = 17.3825
PLEASE GIVE BRAINLIEST!